Smoke-stack.



No. 781,875. PATENTED FEB. 7, 1905. G. FOLTZ & H. L. FULLER.

SMOKE STACK.

APPLIOATION FILED SEPT,19, 1904.

JNVENTOR6 Chesfer fin/f2 Horace Leon Fu//er- WJTNESSES:

UNITED STATES Patented February 7, 1905.

PATENT OF ICE.

SMOKE-STACK.

SPECIFICATION forming part of Letters Patent No. 781,875, dated February7, 1905.

Application filed September 19,1904. Serial No. 225,112.

To m 1171/11/11, if 'nmy con/eerie.-

Be it known that we, OI-IEsrER FoL'rz and l'lORACE LEON FULLER, citizensof the United States of America, residing at Denver, in the county ofDenver and State of Colorado, have invented certain new and usefulImprovements in Smoke-Stacks, of which the following is a specification.

Our invention relates to improvements in smoke-stacks, and isparticularly adapted to be used on locomotives in which the exhauststeamfrom the cylinders is discharged in the smoke-box to increase the draftof the engine.

it is a well-known fact that wherever a railroad traverses a woodedsection of country or a settlement the burning substances which almostconstantly are emitted from the chimneys of passing engines have been amenace to the forests and houses along the road, not infrequentlyresulting in disastrous fires, causing untold loss of timber and othervaluable properties.

The object of our invention is to provide a smoke-stack of simpleconstruction in which the sparks and other ignited products of imperfectcombustion of the fuel on the grate in the fire-box will be extinguishedbefore they are emitted from the stack into the open, thus practicallyeradicating the dangers hereabove described.

\Ve attain our object by the mechanism illustrated in the accompanyingdrawings, in which Figure 1 represents a vertical section taken throughthe upper portion of a locomotive smoke box surmounted by our improvedsmoke-stack; Fig. 2, a composite view, the left-hand side of whichrepresents a horizontal section taken along the line 2 2, Fig. 1,looking downward, while the right-hand side is a section taken along theline 2 2, Fig. 1, looking upward. Fig. 3 represents an enlarged verticalsection of the upper portion of the smoke-box with base and lowerportion of the chimney.

Similar reference characters refer to similar parts throughout thevarious views.

The smoke-stack or chimney 5 is composed of two concentric hollowcylinders 6 and 7, preferably made of sheet metal, the outer one ofwhich is surmounted by a diamond-shaped top or bonnet 8, consisting oftwo truncated cones 8 and 8, placed one above the other and meeting attheir largest portion. The inner cylinder 7, extending into the coneshaped top 8, terminates below an invertedcup-shaped deflector 9, whichis suspended inside the bonnet 8 by means of ratlialLV-extending arms10, which, forming part of the deflector, are secured to the top 8 byrivets or other suitable means. A wire screen 23 is placed across top 8,preferably at the junction of the two cones and a short distance abovedeflector 9.

Pipes 6 and 7 are erected on and secured to a base 11, consisting of aring 12 an.l a surrounding tlange 13, by means of which it is bolted orriveted to the arch of the smokebox 14. The cylindrical portion 12 ofbase 11 extends in between pipes 6 and 7, thus forming an annularchamber 15 between the two, while the inner pipe 7 of chimney 5communicates with the interior of the smoke-box by means of a circularopening 16 cut in its arch.

17 represents the nozzle of the exhaustpipe, through which the steamexhausted from the cylinders is discharged into the smoke-box, while 18indicates the so-called petticoat-pipe, which forms the conduit for theexhausted steam from the nozzle to the chimney. V

19 and 19 are two pipes, which, being suspended from the lower surfaceof base 11 by means of flanges 20 and 20, communicate with apertures 2121, extending through the cylindrical portion 12 of base 11, while theirlower inwardly-curving extremities terminate at points a short distancebelow the mouth of exhaust-pipe 17.

The outer cylinder 6 of chimney 5 is provided near its lower extremitywith two or more hand-holes 22, normally closed byscrewplugs 2% andaffording access to the annular chamber 15 when it is desired to removeaccumulated matter therefrom or to clean out pipes 19.

The products of combustion having passed from the grate in the lire-boxthrough the boiler-tubes into smoke-box Isl are drawn into the innercylinder 7 of smoke-stack 5 through opening 16, the natural draft of theengine being augmented by the steam escaping through nozzle 17. Whenstriking deflector 9, the heavy ignited partly-consumed substanceswhich, with the smoke and gases, escaped from the fire-box are deflectedagainst the inner surface of cone 8 of top 8 and fall into the annularchamber 15 between pipes 6 and 7 of the chimney, while the lighterproducts of combustion, such as smoke and gases, escape through thewire-netting 23 into the open. The exhaust-steam, emitted withconsiderable speed from nozzle l7,creates a partial vacuum in smoke-box14:, the most perfect vacuum being obtained below the opening of thenozzle or the point where pipes 19 terminate. This fact, in cooperationwith. the air-pressure in chamber 15, will cause the sparks, cinders,and other heavy substances deflected into said chamber to be drawnthrough apertures 21 in base 11 and through pipes 19 into thesmoke-chamber, from where the moment they leave said pipes they willonce more be drawn into cylinder 7 of the chimney. The above-mentionedsubstances, which, as explained, were burning when they entered thesmoke-box, have during this operation been extinguished, in consequenceof which, as well as by the friction against the walls of the variouspipes, they have been reduced in weight, with the result that whenemitted from pipe 7 they will, together with the smoke and gases, escapeinto the open. In case the sparks or glowing cinders are unusually largeor not quite extinguished cum stances.

when emitted from pipe 7 the second time the above-explained operationwill be repeated until the desired lightness has been obtained.

Pipes 19, as shown in the drawings, are for the purpose of increasingtheir volume made oblong in cross-section. Their shape, however, is notessential to the effective operation of the device and may be altered tosuit cir- It must, furthermore, be understood that pipes 19 instead ofterminating below the mouth of the exhaust-pipe may be bent in oppositedirection or to any part of the smoke-box, depending on circumstancesand the nature and size of the engine to which they are applied. Theshape as well as the relative positions of the other parts of the devicemay also be changed without departing from the spirit of the invention.

Having thus explained our invention. what we claim is The combinationwith a smokebox,a steamexhaust pipe opening therein, a chimney composedof two concentric pipes, the inner one opening in said smoke-box and adeflector mounted inside the outer pipe and above the inner one, ofconduits leading from the space between said pipes, their extremitiesterminating below and in close proximity to the orifice of theexhaust-pipe.

In testimony whereof we have aifixed our signatures in presence of twowitnesses.

CHESTER FOLTZ. HORACE LEON FULLER.

Witnesses:

G. J. ROLLANDET, K. M. STUMP.

